idle...the bain of my existence
Here's my story -
65 conv with 306, afr heads, weiand stealth, 600 cfm summit carb, tri y's, custom cam.
Installed the custom cam in the spring and have been tuning idle ever since. Off idle it runs like a scalded dog. But I can't get it to idle right.
It will start it up and it will fast idle at 1500rpm until I stab the gas pedal than it will go right down to 750 rpm. Drive around for awhile and come to a stop and it is up at 1000-1100 rpm and won't come down.
I fixed a vacuum leak in my brake booster and things settled down for a bit - but now the fast idle is back. My secondary transfer slots are closed, and my primaries are opened about a turn and a half.
I know I should measure the actual transfer slot opening, but I am tired of pulling this carb... I have played with secondary slot open and primary closed multiple times.
It has sight plugs for the floats and they are spot on.
The cam makes tons of dynamic compression and is a bit lumpy.
thoughts for additional troubleshooting? I've got an Edlbrck 500 I may put on it just to see...